In what way do the biceps and triceps muscles bring about movement at the elbow joint?
- Abiceps contracts, arm bends up; triceps contracts, arm straightens
- Bbiceps contracts, arm straightens; triceps contracts, arm bends up
- Cbiceps relaxes, arm bends up; triceps relaxes, arm straightens
- Dbiceps relaxes, arm straightens; triceps relaxes, arm bends up